Clutch.



No. 728,720. PATENTED MAY 19, 1903.

W. F. JAENEGKE.

CLUTCH. APPLIOATION FILED mm. 12, 1902.

NO MODEL.

attozum UNITED STATES Patented May 19, 1903.

PATENT OFFICE.

'CLUTCH.

SPECIFICATION forming part of Letters Patent No. 728,720, dated May 19,1903.

Application filed March 12, 1902. Serial No. 97,906. (No model.)

To aZZ whom it may concern:

Be it known that I,WILHELM F. J AENEcKE, a citizen of the United States,residing at S.ala manca,in the county of Oattaraugus and State of NewYork, have invented a new and useful Clutch, of which the following is aspecification.

The present invention relates to clutches, and while particularlyintended as an improvement in clutch-pulleys it will be evident that itmay be employed in other connections.

One of the objects of the invention is to provide a clutch which ispositive in its operation and will not be liable to accidentally lookwhen in inoperative position or unlock when in operative position.

A further object is to provide a clutch in which the mechanism iscompletely inclosed, so as to be protected from injury, and having noprojecting portions liable to catch the clothing of workmen employedabout the same, thereby practically eliminating danger of accidents fromthis cause.

An embodiment of the invention, which has proven entirely satisfactory,is illustrated in the accompanying drawings, as described in thefollowing specification; but changes may be made from this embodiment,provided they are within the scope of the claims hereto appended.

In the drawings, Figure 1 is a face view of the pulley. Fig. 2 is avertical longitudinal sectional view of the same, taken on the line X Xof Fig. 1, Fig. 3 is a vertical transverse section taken on the line Y Yof Fig. 2. Fig. 4 is a detail sectional view through the fixed clutchmember, clearly illustrating the manner of mounting the operating-shaft.Fig. 5 is a viewin elevation of the sprocket-wheel and operating-shaft,and Fig. 6 is a vertical sectional view through the adj usting-screw.

Similar reference-humeralsdesignate corresponding parts in all thefigures of the drawings.

The clutch as illustrated consists of three elements or members, a loosemember 10, a fixed member 11, and a throw-off head 12, these severalmembers being preferably located upon a single shaft, as 13. It will beunderstood that the terms loose and fixed as applied to the clutchmembers 1 are merely relative to distinguish between them for the sakeof clearness and to avoid any danger of confusion in the description andclaims.

The loose member 10 in the present instance is in the'form of a pulleycomprising a hub 14, a web 15, and a rim 16, thehub being provided witha bushing 17 and being loosely journaled upon the shaft 13. A stopcollar 18, fastened to the shaft by means of a set-screw 19, preventslongitudinal movement of the loose member in one direction. Located uponthe inner face of the rim 16, adjacent to the web 15, is abearing-flange 20, having an annular V-shaped channel or groove 21, thepurpose of which will hereinafter more fully appear.

The fixed member 11 comprisesa hub 22, secured to the shaft 13 by meansof a key 23, said key being held against accidental displacement by aset; screw 24. This hub is provided with a flange or cap-plate 25, thatfits within the rim 16 of the loose member directly adjacent to thebearing-flange 20. Pivoted upon the inner face of the cap-plate are jaws26, carrying friction-blocks 27, that are located in the annular groove21 and are movable into and out of engagement with the surface thereofupon the movement of the jaws. These jaws are each pivoted at one endupon'a pin 28, screwed into or otherwise attached to the cap-plate 25.Their opposite ends are connected by a screw 29, the opposite ends ofwhich are right and left threaded, and are screwed intosimilarly-threaded nuts 30, arranged in sockets made for the purpose inthe ends of the jaws, said nuts being held in place by set-screws 31.This screw 29 is provided with a sprocket-wheel 32, rigidly fixedthereto. I

On the outer side of the cap-plate 25 is arranged an operating-shaft 33,which is journaled in spaced cars 34 and is provided with a crank-arm 35and a sprocket-wheel 36. This sprocket-wheel is revolubly adjustableupon the operatingshaft, and to this end the portion of'said shaft whichfits between the ears 34 is angular in cross-section, While thesprocket-wheel is provided with a similarlyshaped opening that receivesthis portion of the shaft. In order that the operating-shaft may beremoved, one of the ears 34 has an enlarged opening through which theangular portion of the shaft will pass, said opening being normallyclosed bya bushing 37. The sprocket-wheel 36 is preferably larger thanthe sprocket-wheel 32 of the screw, and the two are connected by achain, as 38, so that upon the rotation of the operating-shaft 33 thescrew will also be rotated and tea greater degree.

The throw-01f head 12 is slidably mounted upon the shaft 13 and thefixed member 11 and is movable toward and from the capplate 25. Thisthrow-0E head is provided with a suitable annular groove 39, adapted toreceive the usual operating-lever. It furthermore has a casing portion40, that incloses the operating-shaft and the other mechanism located onthe fixed member outside the cap-plate. As a result the entire mechanismis completely inclosed. This throw-off head is connected with theoperating-shaft 33 in the following manner: A hollow adjusting-screw 41is threaded into the casing portion 40 and is counterbored to provide anannular shoulder 42. A head 43 is swiveled in the adjusting-screw byhaving a stem 44 located in the bore thereof and having an upset portion45, that engages over'the shoulder 42. A link 46 pivotal'ly connectsthis head with the end of the erankarm. It will therefore be seen thatwhen the throw-0E head is moved in one direction through the connectionabove described the operatingshaft will be rotated, consequentlyrotating the screw 29, which will force the jaws apart and intoengagement with the loose member. As a result the two members will belocked together and the loose member will rotate with the shaft. On theother hand, when the throw-0E head is moved in the opposite direction areverse movement of the several elements will take place, so that thejaws will be moved toward each other, thereby disengaging the loosemember. Should the bearing-blocks 27 of these jaws become worn, the wearmay be taken up by rotating the adjusting-screw 4.1, and if this is notsufficient the operating-shaft 33 may be withdrawn from thesprocket-wheel 36 and rotated so as to throw the crank-arm into adifferent position with relation thereto, and the screw 41 may be thenadjusted to get the exact movement required.

The advantages for this construction may be summed up as follows: In thefirst place the operating mechanism is entirely inclosed by thecap-plate and the throw-off head, so that it is protected from injuryand there are no projecting portions to catch the clothing of workmen.Further than this the specific construction set forth insures a positivelooking and unlocking movement and is not liable to be accidentallyoperated by the vibrations of the shafting'or machinery. Further thanthis means are provided for taking up the wear of the jaws upon theloose member, so

that the necessity of frequent renewals of these elements are notnecessary.

From the foregoing it is thought that the construction, operation, andmany advantages of the herein-described invention will be apparent tothose skilled in the art Without further description, and it will beunderstood that various changes in the size, shape, proportion, andminor details of construction may be resorted to without departing fromthe spirit or sacrificing any of the advantages of the'invention.

Having thus described my invention, what I claim as new,and desire tosecure by Letters Patent, is-

1. The combination witha loose clutch member having a projecting rim, ofa fixed memberhaving a cap-plate that fits Within the rim of the loosemember, and has its inner face spaced therefrom forming a chamber, a jawmounted upon the inner face of the cap plate of the fixed member, andarranged in the said chamber, said jaw being movable into and out ofengagement with the loose member, operating means for moving the jaw,said means being located upon the fixed member exterior to the cap-plateand passing entirely through the same, a throw-0E head movably mountedwith relation to the fixed member and having a positive connection withthe operating means, said head having a casing portion that inclosessaid operating means.

2.- The combination with a loose clutch member, of a fixed member, a jawcarried by the fixed member and movable into and out of engagement withthe loose member, operating means for the jaw also carried by the fixedmember, a throw-0H head movably mounted with relation to the fixedmember and having an adjustable connection with the operating means,said head havinga casing portion that incloses said operating means.

3. The combination withaloose clutch member, of a fixed clutch member, ajaw carried by the fixed member and movable into and out of engagementwith the loose member, a screw having a connection with the jaw andprovided" with a sprocketwheel, another sprocket-Wheel journaled uponthefixed member, a chain connecting the two wheels, a throw-off headmovably mounted with relation to the fixed member, and a connectionbetween the throw-oft head and the latter sprocket-wheel to rotate thesame upon the movement of the head.

4. The combination with a loose clutch member, of a fixed clutch member,a jaw carried by the fixed member and movable into and out of engagementwith the loose member, a

screw having an engagement with the jaw and provided with asprocket-wheel, a shaft journaled upon the fixed member and carrying asprocket-wheel and a crank-arm,a chain connecting the twosprocket-wheels, a throwofi head movably mounted with relation to IIOthe fixed member, and a connection between the throw-off head and thecrank-arm of the shaft. v

5. The combination withaloose clutch member, of a fixed clutch member, ajaw carried by the fixed member and movable into and out of engagementwith the jaw and provided with a sprocket-wheel, a shaft journaled uponthe fixed member and carrying a sprocketwheel and a crank-arm, saidsprocket-wheel having a revoluble adjustment upon the shaft, a chainconnecting the two sprocketwheels, a throw-off head movably mounted withrelation to the fixed member, and a connection between the throw-0E headand the crank-arm of the shaft.

6. The combination withaloose clutch member, of a fixed clutch member, ajaw carried by the fixed member and movable into and out of engagementwith the loose member, a screw having an engagement with the jaw andprovided with a sprocket-wheel, a shaft journaledupon the fixed memberand carrying a crank-arm, the said shaft having aportion angular incross-section, a sprocketwheel detachably fitted upon the angularportion of the shaft, a chain connecting the two sprocket-wheels, athrow-off head movably mounted with relation to the fixed member, and aconnection between the throw-off head and the crank-arm of the shaft.

7. The combination withaloose clutch member, of a fixedclutch member, ajaw carried by the fixed member and movable into and out of engagementwith the loose member, a screw having a connection with the jaw andprovided with a sprocket wheel, another sprocket wheel jourualed uponthe fixed member, a chain connecting the two sprocketwheels, a throw-offhead movably mounted with relation to the fixed member, and anadjustable connection between the throw-0E head and the lattersprocket-wheel to rotate the same upon the movement of the head.

8. The combination withaloose clutch member, of a fixed clutch member, ajaw carried by the fixed member and movable into and out of engagementwith the loose member, operating mechanism for moving the jaw, athrow-olf head movable with relation to the fixed member, and anextensible connection between the throw-off head and the operatingmechanism.

9. The combination witha loose clutch member, of a fixed clutch member,a jaw carried by the fixed member and movable into and out of engagementwith the loose member, operating mechanism for moving the jaw, athrow-off head movable with relation to the fixed member, a linkconnected to the operating mechanism, and an adjusting-screw threadedinto the throw-off head and having a swivel connection with the link.

10. The combination with a loose clutch member, of a fixed clutchmember, a jaw carried by one member and movable into and out ofengagement with the other member, operating mechanism in the form ofgearing for moving the jaw, said mechanism being mounted upon the memberhaving said jaw, a throw-0E head movable with relation to the members,and an adjustable connection between the throw-ofi head and the gearing.

11. The combination with a loose clutch member, of a fixed clutchmember, a jaw carried by one member and movable into and out ofengagement with the other member, means for moving the jaw, said meansincluding an operating-shaft and a gear-wheel having a revolubleadjustment on the operating-shaft, a throw-0E head movable with relationto the members, and a connection between the throw-ofi head and theoperatingshaft.

In testimony that I claim the foregoing as my own I have hereto affixedmy signature in the presence of two witnesses.

WILHELM F. JAENECKE.

Witnesses:

G. S. BENEDICT, W. H. HAZARD.

